Filtering by
- Creators: Julie Ann Wrigley Global Institute of Sustainability
- Creators: Spindler, Rob
- Member of: Faculty and Staff
- Member of: ASU Scholarship Showcase
The evolution of cooperation is a fundamental problem in biology, especially for non-relatives, where indirect fitness benefits cannot counter within-group inequalities. Multilevel selection models show how cooperation can evolve if it generates a group-level advantage, even when cooperators are disadvantaged within their group. This allows the possibility of group selection, but few examples have been described in nature. Here we show that group selection can explain the evolution of cooperative nest founding in the harvester ant Pogonomyrmex californicus. Through most of this species’ range, colonies are founded by single queens, but in some populations nests are instead founded by cooperative groups of unrelated queens. In mixed groups of cooperative and single-founding queens, we found that aggressive individuals had a survival advantage within their nest, but foundress groups with such non-cooperators died out more often than those with only cooperative members. An agent-based model shows that the between-group advantage of the cooperative phenotype drives it to fixation, despite its within-group disadvantage, but only when population density is high enough to make between-group competition intense. Field data show higher nest density in a population where cooperative founding is common, consistent with greater density driving the evolution of cooperative foundation through group selection.
Materials produced for the workshop hosted by the Humane Cities Initiative, Institute for Humanities Research, Arizona State University. Participants were sent this package of archival materials and links to brief online sources for advance readings. Also enclosed are PDF renderings of introductory powerpoint files by Spindler and Pagan, and an audio recording of the discussion joined in progress.
Presentation slides regarding the history of Victory Village, the trailer park built in 1945-46 to provide housing for WWII Veterans and their families at Arizona State University's Tempe campus. A presentation of research from University Archives records conducted in the summer of 2018. The presentation was videotaped as a lecture for Professor Volker Benkert's online World War II history class.
Powerpoint slides from Spindler's presentation at the 56th annual Arizona History Convention in Tucson, Arizona, April 24th, 2015. Details of the 1993-1995 U.S. District Court orders directing the corporate archives to Arizona State University and ASU's efforts to recover information from an obsolete digital imaging system are presented.
This research study will discover and evaluate information about existing crowdsourcing or participatory archives projects devoted to archival description, indexing or transcription. Many related projects that use crowdsourcing for collecting archival materials from the public are not specifically addressed here. In this research, the author has specifically sought evaluative information about exemplary projects that can lead to useful specifications for a participatory archives system at Arizona State University Libraries.
Presentation slides describing an Arizona Centennial project to build a digital library and facilitate community discussion about why people came to Arizona, why they stayed, and why they left. Presentation was made at Friendship Village, Tempe AZ, November 2011.
The Task Force of thirty faculty members and academic professionals was charged by the University Libraries and the Graduate College to "examine the potential for implementing a university program for Electronic Theses and Dissertations (ETDs). The Task Force was specifically asked to collect information about existing programs elsewhere, identify ASU graduate programs that could host pilot programs and prepare a comprehensive white paper..." with a recommended plan for implementation.